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CI Fortify – Advice for isolating vital systems

critical
CI Fortify – Advice for isolating vital systems CI Fortify – Advice for isolating vital systems (PDF) CISA and the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC), in collaboration with the Federal Bureau of Investigation and international partners, released joint guidance CI Fortify – Advice for isolating vital systems . This guidance contains practical steps for critical infrastructure (CI) organizations to isolate vital operational technology and enabling systems from all other networks in the event of disruption or crisis and operate in isolation for an extended period. Developed to address escalating cyber threats, the guidance outlines key steps for identifying critical systems, mapping connections, and implementing effective separation points. By following these recommendations, organizations can enhance their resilience, minimize disruption, and maintain essential services during cyber incidents or geopolitical crises.

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What
Guidance has been released for isolating vital systems in critical infrastructure.
Who is affected
Organizations in critical infrastructure sectors.
Urgency
Remediation is critical to enhance resilience against cyber threats.
Action
Organizations should follow the guidance to isolate vital systems.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
CISA Cybersecurity Advisories (US · national-cert · site)
Severity
critical
Published
2026-07-28
Exploitation
Not in CISA KEV at last sync

Original advisory: https://www.cisa.gov/resources-tools/resources/ci-fortify-advice-isolating-vital-systems

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